This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A289665 #17 Jul 06 2025 11:33:47 %S A289665 4,14,25,77,151,428,616,1005,1517,2902,7664,7722,8284,48380,161644, %T A289665 698074,2761234,8357693,9758410,20285553,21123128,43031555,96835113, %U A289665 318539488,534261087,672081919,873949289,1997008416,2720040151,3321778833,3663025425,3924572413,7241174991 %N A289665 Number of integers in the interval [2,A289663(n)] whose greatest prime factor is equal to the n-th popular prime A385503(n). %C A289665 See A385503 for further links and information. %H A289665 Nathan McNew, <a href="https://www.researchgate.net/profile/Nathan-Mcnew/publication/275363769_Popular_values_of_the_largest_prime_divisor_function/">Popular values of the largest prime divisor function</a> (corrected version), page 16, November 2015. %Y A289665 Cf. A006530, A385503, A289661-A289664. %K A289665 nonn,more %O A289665 1,1 %A A289665 _N. J. A. Sloane_, Jul 25 2017 %E A289665 Edited, with terms updated from revised version of McNew, by _Peter Munn_, Jul 04 2025 %E A289665 Name corrected by _Pontus von Brömssen_, Jul 05 2025